1. Department of Medical Genetics and Molecular Biology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
2. Department of Medical Genetics, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
3. Genetic Section, Biology Department, Faculty of Sciences Isfahan University, Isfahan, Iran
4. Department of Gastroenterology, Hannover Medical School, Hannover, Germany
5. Department of Medical Microbiology, Faculty of Medicine, Shahed University of Medical Sciences, Tehran, Iran